remove one more reference to `bittorrent-swarm`
remove one more reference to `bittorrent-swarm`

joshterrill/webtorrent,webtorrent/webtorrent,feross/webtorrent,yciabaud/webtorrent,jamesliu96/webtorrent,arestov/webtorrent,yciabaud/webtorrent,jamesliu96/webtorrent,webtorrent/webtorrent,joshterrill/webtorrent,feross/webtorrent